From the licensing terms:

Redistribution of this software is permitted only for non-beta, officially released versions.
The "problem" is that there aren't any non-beta, officially released versions (yet).

You, personally, can download the current beta, and using nothing more than an official KNOPPIX CD-ROM, build all the pieces you need on /ramdisk, and stick them on a floppy so they can be loaded the next time you boot KNOPPIX. There is no need to write to a hard drive. I posted detailed instructions on how I got an HSF modem working in the Hardware forum.